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Chemical Engineering - Process Control and Instrumentation - Discussion

Discussion Forum : Process Control and Instrumentation - Section 6 (Q.No. 42)
Process Control and Instrumentation
42.
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
emf produced is very low of the order of microvolt.
embrittlement of iron occurs.
rusting of iron takes place.
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.
Sayan said:   9 years ago
The question should be "It can NOT be used to measure sub-zero temperature" because if embrittlement and rusting take place the instrument will be wasted! please post if not.
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